Adds password protected files to modular computers.

code/modules/modular_computers/file_system/computer_file.dm

@@ -4,10 +4,11 @@ var/global/file_uid = 0
 	var/filename = "NewFile" 								// Placeholder. No spacebars
 	var/filetype = "XXX" 									// File full names are [filename].[filetype] so like NewFile.XXX in this case
 	var/size = 1											// File size in GQ. Integers only!
-	var/obj/item/computer_hardware/hard_drive/holder	// Holder that contains this file.
+	var/obj/item/computer_hardware/hard_drive/holder		// Holder that contains this file.
 	var/unsendable = 0										// Whether the file may be sent to someone via NTNet transfer or other means.
 	var/undeletable = 0										// Whether the file may be deleted. Setting to 1 prevents deletion/renaming/etc.
 	var/uid													// UID of this file
+	var/password = ""										// Placeholder for password.
 
 /datum/computer_file/New()
 	..()
@@ -36,4 +37,15 @@ var/global/file_uid = 0
 	else
 		temp.filename = filename
 	temp.filetype = filetype
-	return temp
+	temp.password = password
+	return temp
+
+/datum/computer_file/proc/can_access_file(var/mob/user, input_password = "")
+	if(!password)
+		return TRUE
+	else if(!input_password)
+		input_password = sanitize(input(user, "Please enter a password to access file '[filename]':"))
+	if (input_password == password)
+		return TRUE
+	else
+		return FALSE

code/modules/modular_computers/file_system/programs/generic/file_browser.dm

@@ -55,7 +55,8 @@
 					"name" = F.filename,
 					"type" = F.filetype,
 					"size" = F.size,
-					"undeletable" = F.undeletable
+					"undeletable" = F.undeletable,
+					"encrypted" = !!F.password
 				)))
 			data["files"] = files
 			if(RHDD)
@@ -66,7 +67,8 @@
 						"name" = F.filename,
 						"type" = F.filetype,
 						"size" = F.size,
-						"undeletable" = F.undeletable
+						"undeletable" = F.undeletable,
+						"encrypted" = !!F.password
 					)))
 				data["usbfiles"] = usbfiles
 
@@ -83,7 +85,13 @@
 	switch(href_list["action"])
 		if("PRG_openfile")
 			. = 1
-			open_file = href_list["name"]
+			var/datum/computer_file/F = HDD.find_file_by_name(href_list["PRG_openfile"])
+			if (!F)
+				return
+			if (F.can_access_file(usr))
+				open_file = href_list["PRG_openfile"]
+			else
+				return
 		if("PRG_newtextfile")
 			. = 1
 			var/newname = stripped_input(usr, "Enter file name or leave blank to cancel:", "File rename", max_length=50)
@@ -197,4 +205,23 @@
 			if(!F || !istype(F))
 				return 1
 			var/datum/computer_file/C = F.clone(0)
-			HDD.store_file(C)
+			HDD.store_file(C)
+		if("PRG_encrypt")
+			. = 1
+			if(!HDD)
+				return 1
+			var/datum/computer_file/F = HDD.find_file_by_name(href_list["name"])
+			if(!F || F.undeletable)
+				return 1
+			if(F.password)
+				return
+			F.password = sanitize(input(usr, "Enter an encryption key:", "Encrypt File"))
+		if("PRG_decrypt")
+			. = 1
+			if(!HDD)
+				return 1
+			var/datum/computer_file/F = HDD.find_file_by_name(href_list["name"])
+			if(!F || F.undeletable)
+				return 1
+			if(F.can_access_file(usr))
+				F.password = ""